How much does it cost to fix boiler error code Red light?

Typical repair cost for the boiler Red light fault is £90-280 including labour.

Red light High

Boiler Fault Code Red light

Also written as REDLIGHT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Red light appears across 4 boiler brands and 7 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has shut down for safety because it cannot maintain a steady pilot light or has detected a problem with how waste gases are being removed. (As reported on Glow-worm Glow-worm Fuelsaver 56 3E)

Pick your boiler brand for the Red light fix

Baxi Red light 2 models Firebird Red light 1 model Glow-worm Red light 2 models Worcester Bosch Red light 2 models

Source

Information for the Red light fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026